The year is established by the relationship between this letter and
the letter from C. P. Haussoullier, 31 January 1869.

+

f2 6597.f2

Murray refers to Journal of researches, which was first published
in 1839 (see letter to John Murray, [1--3 February 1869]).
Murray also refers to the term of protection under copyright,
which was twenty-eight years under the 1814 Copyright Act, and was
extended to the author's life plus seven years under the
1842 Copyright Act (Seville 2006, p. 9). Evidently, the terms of the
earlier act applied here.

+

f3 6597.f3

Murray refers to Facts and arguments for Darwin (Dallas
trans. 1869), which was a translation of Fritz Müller's Für
Darwin (F. Müller 1864a).

+

f4 6597.f4

William Clowes & Sons were the printers employed by
Murray. The reference is to the fifth edition of Origin (Murray
evidently wrote `Variation' in error). CD finished corrections for the
edition on 10 February 1869 (see `Journal' (Correspondence vol. 17, Appendix II)).